This method is usually better because the band saw has a guide rail making the cuts quicker and more accurate. Remember to cut the shoulders of your tenons first so that you do not cut to far later on.
Step3: The next step is marking out the mortise and the first things you need to do is decide where you want to position the joint.
Next you can use your recently cut tenon as a guide for the width of your mortise and you do this by resting it across the timber that will have the mortise and drawing lines along the two edges of the tenon.
After you have the width sorted you must put two more lines in between the ones you have already drawn to create the thickness of your mortise.
The thickness will be the same as the tenons thickness and you can use it again as a template if you need to but remember to measure the space on each side of the mortise to ensure it is centre.